Vividcortex script

This script adds support for VividCortex tools.

 Examples:
`hubot share top-queries last month`
`hubot share top-processes last 10 minutes`
`hubot share query-compare last 20 days`

It's important to check if these environment variables are defined before using them. See https://github.com/github/hubot/blob/master/docs/scripting.md#environment-variables for some ideas on how to erro check them.